The motor starts when the start button in the illustration is pushed, but stops when the button is released. What is most likely the trouble? Illustration EL-0007

Correct Answer: Option A — an open auxiliary "M" contact

When the start button is depressed, the coil energizes, but releasing it drops out the circuit if the holding seal-in circuit fails. An open auxiliary 'M' contact prevents the control circuit from maintaining power to the main coil.